Mill Supply carries a variety of Blades including Grasshawg 4 Sided Blades.

16.25"x2"x.240" Low-Lift Blade, Sharpened all 4 sides, 5/8" center hole dia. Low Lift

17"x2"x.240" Low-Lift Blade, Sharpened all 4 sides, 5/8" center hole dia., Low-Lift

18"x2"x.240" Low-Lift Blade, Sharpened all 4 sides, 5/8" center hole dia. Low-Lift

20.5"x2"x.240 Low-Lift Blade, Sharpened all 4 sides, 5/8" center hole dia., Low-Lift

21"x2"x.240 Low lift blade, 5/8"center hole dia. Sharpened all 4 sides.
Mower-parts.net is your complete resource for quality Grasshawg 4 Sided Blades as well as other Lawn Mower Parts & Landscaping Parts and accessories.